blob: e520295af0c457f34332060bb23aac9f3b59ea63 [file] [log] [blame]
/*
* Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <alloca.h>
#include <errno.h>
#include <infiniband/arch.h>
#include "ibverbs.h"
static pthread_once_t device_list_once = PTHREAD_ONCE_INIT;
static int num_devices;
static struct ibv_device **device_list;
static void count_devices(void)
{
num_devices = ibverbs_init(&device_list);
}
struct ibv_device **__ibv_get_device_list(int *num)
{
struct ibv_device **l;
int i;
if (num)
*num = 0;
pthread_once(&device_list_once, count_devices);
if (num_devices < 0) {
errno = -num_devices;
return NULL;
}
l = calloc(num_devices + 1, sizeof (struct ibv_device *));
if (!l) {
errno = ENOMEM;
return NULL;
}
for (i = 0; i < num_devices; ++i)
l[i] = device_list[i];
if (num)
*num = num_devices;
return l;
}
default_symver(__ibv_get_device_list, ibv_get_device_list);
void __ibv_free_device_list(struct ibv_device **list)
{
free(list);
}
default_symver(__ibv_free_device_list, ibv_free_device_list);
const char *__ibv_get_device_name(struct ibv_device *device)
{
return device->name;
}
default_symver(__ibv_get_device_name, ibv_get_device_name);
uint64_t __ibv_get_device_guid(struct ibv_device *device)
{
char attr[24];
uint64_t guid = 0;
uint16_t parts[4];
int i;
if (ibv_read_sysfs_file(device->ibdev_path, "node_guid",
attr, sizeof attr) < 0)
return 0;
if (sscanf(attr, "%hx:%hx:%hx:%hx",
parts, parts + 1, parts + 2, parts + 3) != 4)
return 0;
for (i = 0; i < 4; ++i)
guid = (guid << 16) | parts[i];
return htonll(guid);
}
default_symver(__ibv_get_device_guid, ibv_get_device_guid);
struct ibv_cq_ex *__lib_ibv_create_cq_ex(struct ibv_context *context,
struct ibv_cq_init_attr_ex *cq_attr)
{
struct verbs_context *vctx = verbs_get_ctx(context);
struct ibv_cq_ex *cq;
if (cq_attr->wc_flags & ~IBV_CREATE_CQ_SUP_WC_FLAGS) {
errno = EOPNOTSUPP;
return NULL;
}
pthread_mutex_lock(&context->mutex);
cq = vctx->priv->create_cq_ex(context, cq_attr);
if (cq) {
cq->context = context;
cq->channel = cq_attr->channel;
if (cq->channel)
++cq->channel->refcnt;
cq->cq_context = cq_attr->cq_context;
cq->comp_events_completed = 0;
cq->async_events_completed = 0;
pthread_mutex_init(&cq->mutex, NULL);
pthread_cond_init(&cq->cond, NULL);
}
pthread_mutex_unlock(&context->mutex);
return cq;
}
struct ibv_context *__ibv_open_device(struct ibv_device *device)
{
struct verbs_device *verbs_device = verbs_get_device(device);
char *devpath;
int cmd_fd, ret;
struct ibv_context *context;
struct verbs_context *context_ex;
if (asprintf(&devpath, "/dev/infiniband/%s", device->dev_name) < 0)
return NULL;
/*
* We'll only be doing writes, but we need O_RDWR in case the
* provider needs to mmap() the file.
*/
cmd_fd = open(devpath, O_RDWR | O_CLOEXEC);
free(devpath);
if (cmd_fd < 0)
return NULL;
if (!verbs_device) {
context = device->ops.alloc_context(device, cmd_fd);
if (!context)
goto err;
} else {
struct verbs_ex_private *priv;
/* Library now allocates the context */
context_ex = calloc(1, sizeof(*context_ex) +
verbs_device->size_of_context);
if (!context_ex) {
errno = ENOMEM;
goto err;
}
priv = calloc(1, sizeof(*priv));
if (!priv) {
errno = ENOMEM;
free(context_ex);
goto err;
}
context_ex->priv = priv;
context_ex->context.abi_compat = __VERBS_ABI_IS_EXTENDED;
context_ex->sz = sizeof(*context_ex);
context = &context_ex->context;
ret = verbs_device->init_context(verbs_device, context, cmd_fd);
if (ret)
goto verbs_err;
/*
* In order to maintain backward/forward binary compatibility
* with apps compiled against libibverbs-1.1.8 that use the
* flow steering addition, we need to set the two
* ABI_placeholder entries to match the driver set flow
* entries. This is because apps compiled against
* libibverbs-1.1.8 use an inline ibv_create_flow and
* ibv_destroy_flow function that looks in the placeholder
* spots for the proper entry points. For apps compiled
* against libibverbs-1.1.9 and later, the inline functions
* will be looking in the right place.
*/
context_ex->ABI_placeholder1 = (void (*)(void)) context_ex->ibv_create_flow;
context_ex->ABI_placeholder2 = (void (*)(void)) context_ex->ibv_destroy_flow;
if (context_ex->create_cq_ex) {
priv->create_cq_ex = context_ex->create_cq_ex;
context_ex->create_cq_ex = __lib_ibv_create_cq_ex;
}
}
context->device = device;
context->cmd_fd = cmd_fd;
pthread_mutex_init(&context->mutex, NULL);
return context;
verbs_err:
free(context_ex->priv);
free(context_ex);
err:
close(cmd_fd);
return NULL;
}
default_symver(__ibv_open_device, ibv_open_device);
int __ibv_close_device(struct ibv_context *context)
{
int async_fd = context->async_fd;
int cmd_fd = context->cmd_fd;
int cq_fd = -1;
struct verbs_context *context_ex;
context_ex = verbs_get_ctx(context);
if (context_ex) {
struct verbs_device *verbs_device = verbs_get_device(context->device);
verbs_device->uninit_context(verbs_device, context);
free(context_ex->priv);
free(context_ex);
} else {
context->device->ops.free_context(context);
}
close(async_fd);
close(cmd_fd);
if (abi_ver <= 2)
close(cq_fd);
return 0;
}
default_symver(__ibv_close_device, ibv_close_device);
int __ibv_get_async_event(struct ibv_context *context,
struct ibv_async_event *event)
{
struct ibv_kern_async_event ev;
if (read(context->async_fd, &ev, sizeof ev) != sizeof ev)
return -1;
event->event_type = ev.event_type;
switch (event->event_type) {
case IBV_EVENT_CQ_ERR:
event->element.cq = (void *) (uintptr_t) ev.element;
break;
case IBV_EVENT_QP_FATAL:
case IBV_EVENT_QP_REQ_ERR:
case IBV_EVENT_QP_ACCESS_ERR:
case IBV_EVENT_COMM_EST:
case IBV_EVENT_SQ_DRAINED:
case IBV_EVENT_PATH_MIG:
case IBV_EVENT_PATH_MIG_ERR:
case IBV_EVENT_QP_LAST_WQE_REACHED:
event->element.qp = (void *) (uintptr_t) ev.element;
break;
case IBV_EVENT_SRQ_ERR:
case IBV_EVENT_SRQ_LIMIT_REACHED:
event->element.srq = (void *) (uintptr_t) ev.element;
break;
default:
event->element.port_num = ev.element;
break;
}
if (context->ops.async_event)
context->ops.async_event(event);
return 0;
}
default_symver(__ibv_get_async_event, ibv_get_async_event);
void __ibv_ack_async_event(struct ibv_async_event *event)
{
switch (event->event_type) {
case IBV_EVENT_CQ_ERR:
{
struct ibv_cq *cq = event->element.cq;
pthread_mutex_lock(&cq->mutex);
++cq->async_events_completed;
pthread_cond_signal(&cq->cond);
pthread_mutex_unlock(&cq->mutex);
return;
}
case IBV_EVENT_QP_FATAL:
case IBV_EVENT_QP_REQ_ERR:
case IBV_EVENT_QP_ACCESS_ERR:
case IBV_EVENT_COMM_EST:
case IBV_EVENT_SQ_DRAINED:
case IBV_EVENT_PATH_MIG:
case IBV_EVENT_PATH_MIG_ERR:
case IBV_EVENT_QP_LAST_WQE_REACHED:
{
struct ibv_qp *qp = event->element.qp;
pthread_mutex_lock(&qp->mutex);
++qp->events_completed;
pthread_cond_signal(&qp->cond);
pthread_mutex_unlock(&qp->mutex);
return;
}
case IBV_EVENT_SRQ_ERR:
case IBV_EVENT_SRQ_LIMIT_REACHED:
{
struct ibv_srq *srq = event->element.srq;
pthread_mutex_lock(&srq->mutex);
++srq->events_completed;
pthread_cond_signal(&srq->cond);
pthread_mutex_unlock(&srq->mutex);
return;
}
default:
return;
}
}
default_symver(__ibv_ack_async_event, ibv_ack_async_event);